refactor(commands): read the help method's own signature, not the one functools.wraps copies

Codex on f0649558: inspect.signature follows __wrapped__, so an operator-installed command under modules/commands that wraps PingCommand.get_help_text with a get_help_text(self) override looked like it accepted the message, was called with it, and raised where dev retried and returned its help. _accepts_message now uses follow_wrapped=False. New test covers that override. No bundled get_help_text is decorated.

modules/commands/base_command.py

@@ -73,9 +73,13 @@ def _defined_by_bundled_class(command: Any, method: Any) -> bool:
 
 
 def _accepts_message(method: Any, message: Any) -> bool:
-    """Whether ``method(message)`` binds, per its signature (False when that can't be read)."""
+    """Whether ``method(message)`` binds, per its own signature (False when that can't be read).
+
+    ``follow_wrapped=False``: a functools.wraps-decorated override reports the
+    wrapped function's signature otherwise, not its own.
+    """
     try:
-        inspect.signature(method).bind(message)
+        inspect.signature(method, follow_wrapped=False).bind(message)
     except (TypeError, ValueError):
         return False
     return True

tests/test_help_command.py

@@ -271,6 +271,23 @@ class TestGetSpecificHelp:
         cmd = HelpCommand(bot)
         cmd.get_specific_help("operatorweather", Mock())  # must not raise
 
+    def test_wrapped_operator_override_inside_modules_gets_help(self):
+        """functools.wraps must not lend an operator override the bundled signature."""
+        import functools
+
+        from modules.commands.ping_command import PingCommand
+
+        class OperatorPing(PingCommand):
+            @functools.wraps(PingCommand.get_help_text)
+            def get_help_text(self):
+                return "operator help"
+
+        OperatorPing.__module__ = "modules.commands.operator_ping"
+        bot = _make_bot()
+        bot.command_manager.commands = {"operatorping": object.__new__(OperatorPing)}
+        cmd = HelpCommand(bot)
+        cmd.get_specific_help("operatorping", Mock())  # must not raise
+
     def test_local_plugin_help_keeps_the_typeerror_retry(self):
         """A local get_help_text(message=None) that raises TypeError is retried without it."""
         bot = _make_bot()